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11 Helpful Math Formulas for GMAT Quant
[#permalink]
Updated on: 14 Nov 2016, 12:03
Updated on: 14 Nov 2016, 12:03
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Expert Reply
Top Contributor
Please see attached.
This is not meant to be an exhaustive list, just a helpful one. If I'm missing any formulas that you think are essential, then let me know and I'll add them below:
ADDITIONAL FORMULAS
12) % change/increase/decrease = (difference)/(original) x 100
13) # of subsets of a set with n members: \(2^n\)
-Brian
This is not meant to be an exhaustive list, just a helpful one. If I'm missing any formulas that you think are essential, then let me know and I'll add them below:
ADDITIONAL FORMULAS
12) % change/increase/decrease = (difference)/(original) x 100
13) # of subsets of a set with n members: \(2^n\)
-Brian
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Screen Shot 2016-08-17 at 11.11.03 AM.png [ 311.2 KiB | Viewed 4368 times ]
Originally posted by mcelroytutoring on 17 Aug 2016, 11:14.
Last edited by mcelroytutoring on 14 Nov 2016, 12:03, edited 3 times in total.
Last edited by mcelroytutoring on 14 Nov 2016, 12:03, edited 3 times in total.
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Re: 11 Helpful Math Formulas for GMAT Quant
[#permalink]
17 Aug 2016, 13:52
17 Aug 2016, 13:52
Number of ways of doing 3 things? Can you elaborate on that.
Tutor
Joined: 10 Jul 2015
Status:Expert GMAT, GRE, and LSAT Tutor / Coach
Affiliations: Harvard University, A.B. with honors in Government, 2002
Posts: 1182
Given Kudos: 274
Location: United States (CO)
Age: 44
GMAT 1: 770 Q47 V48
GMAT 2: 730 Q44 V47
GMAT 3: 750 Q50 V42
GMAT 4: 730 Q48 V42 (Online)
GRE 1: Q168 V169
GRE 2: Q170 V170
11 Helpful Math Formulas for GMAT Quant
[#permalink]
Updated on: 20 Aug 2018, 11:20
Updated on: 20 Aug 2018, 11:20
Expert Reply
Top Contributor
RaghavSingla wrote:
Number of ways of doing 3 things? Can you elaborate on that.
Sure! This is otherwise known as the "fundamental counting principle."
Let's say 4 = # of breakfast options, 5 = # of lunch options, and 6 = # of dinner options.
My total number of dining possibilities that day is 4 x 5 x 6 = 120.
Originally posted by mcelroytutoring on 17 Aug 2016, 17:13.
Last edited by mcelroytutoring on 20 Aug 2018, 11:20, edited 1 time in total.
Last edited by mcelroytutoring on 20 Aug 2018, 11:20, edited 1 time in total.
